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I just bought a very old story and clark off this lady, I've fixed a few problems but I still have three problems. one- the jacks do not return to rest under the hammer butt, they stay on the curve not letting the back check come back down. How do I fix that? Two- Some of the hammers do not reach the strings unless I press the key very hard. And Three- The tuning pins wont turn. Any help would be nice.

Yes, lost motion and a complete regulation is probably in order. On an old upright this will be a challenge even for a tech with medium level experience. Old pianos have compressed felts, worn buckskin, and a host of other issues.

The tuning pins wont turn? You probably are not using the proper tool, and probably dont know how? Strictly a guess on my part.

Regardless of what others may say, your best best would be to find a good piano technician, to see exactly what your pianos needs.

I'll second Ron's suggestion. Too many possible causes for the various problems to even begin to diagnose here. Call a tech, but be prepared to have the property condemned.

Buying an old piano like that is an iffy proposition. You may think you're getting a good deal, but when you think of the time and money you may have to spend just to get it functioning at a very basic level, you're really not getting such a bargain after all.

Then sometimes you get lucky and get a nice old box in pretty good shape. I wouldn't wager the farm on it, though.

This post reminds me of the customer I had years ago who used a 3/8" allen wrench in a 3/8" 1/4" drive socket. He used the 1/4" hole over the tuning pins to do his tuning complaining of the difficulty of turning several of the pins. He asked me to look at it. It was a "project" piano in his garage.

As it turned out, the difficult pins were the only ones capable of holding the strings at pitch. The rest were nearly falling out!